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3 years ago

If a tabletop has a diameter of 42 inches, what is the surface area to the nearest inch? (pi = 3.14)

Mathematics

1 answer:

Paha777 [63]3 years ago

8 0

Answer:

1345.44

Step-by-step explanation:

Area of a circle is pi times the radius squared.

So 21 x 21 x 3.14

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2 years ago

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3 years ago

Y/3 - 4 = -1 solve for y

Marysya12 [62]

Answer:

y=9

Step-by-step explanation:

First we need to solve al addition and subtraction by performing the inverse operation. In this case, we need to add to reverse the subtraction

y/3 -4= -1

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3 years ago

Use euler's formula to find the missing number <br><br>vertices: 11<br>edges: 34<br>Faces: ?

larisa [96]

Answer:

F = 25

Step-by-step explanation:

Euler's formula for polyhedra states that

F + V - E = 2

Here V = 11, E = 34, thus

F + 11 - 34 = 2

F - 23 = 2 ( add 23 to both sides )

F = 25

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3 years ago

Write a linear equation that passes through the two points (-6, -7) and (3, -4).

Phantasy [73]

linear equation that passes through the two points (-6, -7) and (3, -4) is $y=\frac{1}{3}x-5$

Step-by-step explanation:

We need to write the equation that passes through the two points (-6, -7) and (3, -4).

The equation can be written is point slope form.

The standard form of point slope equation is:

$y=mx+b$

where m is the slope and b is the y-intercept

Finding slope m:

Slope can be found by using formula:

$slope = \frac{y_{2}-y_{1}}{x{2}-x_{1}} \\Where\,\, y_{2}=-4,y_{1}=-7,x{2}=3,x_{1}=-6\\slope =\frac{-4-(-7)}{3-(-6)}\\slope=\frac{-4+7}{3+6}\\slope=\frac{3}{9}\\slope=\frac{1}{3}$